Apparatus for heating castings.



R. W. WIEDERWAX.

APPARATUS EUR HEATING CASTINGS.

' APPLICATION FILED FEB. Il. |918.

1,275,638. Patented Aug. 13, 1918.

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R. Wl WIEDERWAX.

APPARATUS FOR HEATING CASTINGS.

AxfPLlcATmN FIILED lmi, 11. |918.

1,275,638. l PatentedAug. 13, 1918,

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R.. W. WIEDERWAX, APPARATUS FOR HEATING CASTINGS. APLlcMloN. man Fia. 'l1-funs.

1,275,638. Patented Aug. 13,' 191x 3 SHEETS-SHEET 3.

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UNITED STATES PATENT oEEICE.

RoEERT'w. WIEDERWAX, oE ATLANTIC CITY, NEW JERSEY, AssIGNoR 0E CNE-HALE To CARLTON CEIST, 0E ATLANTIC CITY, NEW JERSEY.

APPARATUS ECR HEATING CASTINGS.

Patented Aug. 13, 191s.

Application filed February 11, 1918. v Serial No. 216,659.

My invention relates to apparatus for.

heating castings or thel like, to be welded, in a manner to prevent distorting or cracking of the same.

provide apparatus 0I' the above mentioned character, having means to gradually and evenly heat the castings, prior to welding,vr

and to gradually and evenly cool the same, after the welding operation, such apparatus being adapted to be operated with gaseous fuel, while not necessarily restricted to the use of this particular kind of fuel.

Other objectsk and advantages of the invention will be apparent during the course;

of `the following description.V

In the accompanying drawings forming a part` of this specification and in which like numerals are employed to designatelike parts throughout the same, 1 j Figure '1 is a side elevation of apparatus embodying my invention, ,f

Fig. 2 is a plan view of the same,

Fig. 3 is a vertical longitudinal sectionalV view taken on line 3 3 of Fig. 2,

Fig. 4 is a Vtransverse sectional 'view taken on line 4 4 of Fig. 3,

Fig. 5 -is a longitudinal section through a modified form of heater embodying the in vention, taken on line 5-5 of Fig. 6,

-Fig. 6 is a transverse section taken on line 6 of Fig. 5, and,

` Fig. is a diagrammatic plan view of the apparatus.

In the drawings, wherein for the` purposeY of illustration is shown aV preferred embodiment of'my invention,rthe numeral 5 desig nates a main casing, having legs G secured to the. same, at its corners, and depending, there'fron'i, as shown.V e One side of the casing Y is providedwith a door opening. 7, adapted' to be covered by a vertically swinging door 8, hingedat its lower edge, as shown at 9. The doorvi's held closed by spring catches 10, but anyV other suitabley means VVmay be employed,- for this purpose. V The ldooris equipped Vvnear 'itsupper edge with -thereby preventing fusing.

11,.'as shown. The casing 5 is preferablyV reinforced atfitstop and bottom by stripsV 12and13.

The numeral 14 designates horizontal comy bined support and air supply pipes or conduits, arranged within the upper portion thereof, providing an upper' chamber 15, and a lower chamber 16, in the casing The* outer `en dsV of the pipes 14 extend throughopenings 17 in the ends of the casing 5, and these pipes are arranged in more i Y or less close relation, as indicated in Figs. 2 An important object 'of the invention 1s to and 4. The innerv ends of each pair of pipes 14 Vproject into thel opposite ends of a T- coupling 18, having a downwardly discharging outlet 19, as shown. Airis drawn in through the pipes 14, as indicated by the arrows, and discharges downwardly through the outlets 19, into the chamber 16. Y

The upper chamber 15 is more or less lled with aggregates 20 of refractory material, preferably formed of silica. These mineral aggregates are supported by the pipes 14, as shown. v Y Y Arranged within `the upper end of theV chamber 15 land disposed upon the top of they mass' oflmineral vag, ,rega tes 20, is an open` frame 21, formed of iron or Vthe like, with its. material L-Shaped inA cross-section, aiording a supporting flange 22. Arranged upon the supporting flange 22- are metallic, preferably'- iron, spacing bars or elements23, to receive. the castings thereon. and retain the sameA spaced from the mineral aggregates 20,

Disposed within the chamber 16, near and beneath the pipes 14, are gas burners 24, of

soA

the Bunsenk type.Y These burners comprise.,v

horizontal body portions 25, carrying verti-l Y Galt-ips 26. The burners further comprise shells27, connected with the tubular'body portions 25, to properlymiX air and gas and` to supply Such miXture'to the tubular body portions 25, as is well known. Connected with theshells27 are'pipes 28, having` cuto valvesr29 connected therein. The pipes 2,8 are connected with pipes 30,.'connected byineansofT-couplings-Sl, with agas supply pipe32.l One endof this gas Supply pipe isclosed Vor plugged,`kas shown at 33, while n its opposite end is connected with a source of'gas.`V Cut-ott valves 34 are also connected in the pipes 30.

,i One pipe Ohas*a'T'coupling 35 connected I therein, and havingconnectioniwith'a pipeV 3G elia pilot light, the pipe 36 extending into the upper portion of the chamber 16, in proX- iinity to the burners 24. rhe pipe 36 has a cut-oil' valve 37 connected therein, as shown.

ln the operation ot the apparatus, the castings or the like to be heated, prior to welding, are placed upon the spacing barsV 23, and held thereby in proximity to, but out ot Contact with the mineral aggregates :20. The burners 24 are now lighted and serveto heat the mass 20, which iny turn imparts its heat to the castings, in a gradual and even manner, thereby properly heating the same to prevent cracking or distorting of such castings. vWhen the castings are heated to the proper degree, the welding operation may be effected by the ordinary acetylene welding torch, while the castings are supported by the bars During this welding operation, the burners 24 may be operated, or they may be turned ott, if desired.

After the welding operation has been completed, it is necessary that the castings be cooled gradually, to prevent cracking or distorting ot' the same, and to accomplish this, such castings are placed within the chamber 16, and are thereby subjected Vto the heat radiatingfrom the mass 20, which gradually cools when the burners are turned oit.

During the operation of the burners, they consume the oxygen within the chamber 16, thereby creating a partial vacuum within this chamber. This vacuum draws or sucks in air through the pipes 14, as indicated by the arrows. The pipes 14 being arranged above the burners, the incoming air is heated prior to its discharge in proximity to the tips 26. Y

In Figs. 5 to 7 inclusive, l have shown a dillerent form of heating apparatus embodying my invention. This' apparatus comprises a shell or casing 38, which is preferably double walled and hollow for the reception ot asbestos 39,01' other heat. insulating` material. Horizontal air inlet pipes 40 extend longitudinally within the casing 38, and divide the same intoy upper and lower chambers 41 and 42. The inner ends of the Vpipes 4G are spaced and connected by T-couplings 40', discharging downwardly into the chamber 42,l as shown. The lower chamber 42 is normally substantially closed and is provided with a door opening 43,

adapted .to be covered by a. door 44.

Disposed within the lower chamber 42 Vare gas burners 45, preferably identical with the gas burners These gas burners receive gas from pipes 46, -and the supply of gas-may be controlled by any suitable means. i

Disposed within the upper chamber 4l are preferably longitudinally extending 'eyebeams 47, the lower ends 'of which vproject between certain of the pipes 45. Y The eyebeams 47 are provided fnear their lower edges with transverse openings for the reception of transverse supporting pins 48, arranged upon the top of certain ot' the pipes 4l), and supported thereby. Disposed upon the top of the eye-beamsl 47 and secured Y thereto by any suitable means are T-bars 49, adapted to support the castings or the like to be heated. prior to welding and retain the same spaced a suitable distance from a tilling 50 ot refractory material, such as silica, thereby preventing fusing.

The operation of the second form ot' the intention is so similar to that of the tirst that it is thought to be unnecessary to state the same.

lt is to be understood that the forms ot my invention herewith shown and described are to beftalien as preferred examples of the same, and that various changes in the shape, size, and arrangementot parts may be resorted to without departing from the spirit of the yinvention or the scope ot the subjoined claims.

Having thus described my invention, l claim:

l. In apparatus of the character described, a casing having an upper chamber and a substantially closed lower chamber, a filling of refractory material arranged within the upper chamber, approximately vhorizontal pipes arranged within the top of the lower chamber to supply air therein and serving to support said iilling, a plurality of burners arranged within the lower chamber beneath the pipes,'and spacing bars arranged above and in proximity to the lling.

2. In apparatus of the character described, a easing having an upper chamber and a substantially closed lower chamber, a filling ot refractory material arranged within the upper chamber, an open frame disposed within the upper chamber, spacing bars supported by the open frame, approvimatelyv horizontal pipes arranged within the top of the lower chamber' to supply air therein and serving to support said filling, a plurality of burners arranged within the lower chamber beneath the pipes, and means to supply a fluid fuel to the burners.

'3. In apparatus of the character described, a casing, a set of approximately horizontal pipes arranged within the upper portion o't the casing A and separating the same into upper and lower chambers with the outer ends ot the pipes passing through openings in the lwall of the casing, couplings connecting the inner ends of corresponding pipes and having outlet openings, a filling of reractory aggregates arranged within the upper chamber and supported by the'y pipes,j metallic spacing means disposed at thetop oit the filling, and gas burners arranged inp the' upper portion of the lower chamber near 'and y beneath the pipes.

4. lnapp'aratus of the character described, a casing, having upper and lower chambers and a door opening leading into the lower chamber, a door to cover the dooll opening, a plurality of horizontal pipes arranged at the top of the` lower chamber with their outer ends extending through openings in the wall of the casing and having outlet openings formed therein between the ends thereof for discharging air into the lower chamber, a filling of refractory aggregates arranged within the upper chamber and supported by the pipes, a plurality of gas burners arranged within the lower chamber near and beneath the pipes, and means to suppl)7 gas to the burners.

5. In apparatus of the character described, a casing, substantially horizontal air supply pipes arranged therein and dividing the casing into upper and lower chambers, beams having means to engage with the pipes and be supported thereby, spacing bars arranged upon the tops of the beams, a lling of refractory material disposed within the upper ranged therein and dividing the casing into Y upper and lowerchambers and having outlet openings disposed between the ends of the pipes, beams arranged within the upper chamber, transverse elements carried by the beams and disposed upon the tops ot' the pipes, spacing bars disposed upon the top of the beams and secured thereto, a lling of refractory material arranged within the upper chamber, and gas burners disposed within the lower chamber beneath said lling.

In testimony whereof I affix my signature in presence of two witnesses. Y

ROBERT W. WIEDER-WAX.

Witnesses:

THEO. WV. SOHIMPF, EMMA H. YARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O. 

